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Suryawanshi SM, Badwaik DS, Shinde BS, Gaikwad KD, Shkir M, Chandekar KV, Gundale S. A comprehensive study on structural, magnetic and dielectric properties of Ni0.3Cu0.3Zn0.4Fe1.8Cr0.2O4 nanoparticles synthesized by sol-gel auto combustion route. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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2
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Luo P, Liu W, Zhu D, Sun B, Cao Y, Wang Y. One-step synthesis of Ti3+ self-doped CTO/rGO composites by pulsed laser ablation in liquid with enhanced photocatalytic activity in water purification. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Sakfali J, Ben Chaabene S, Akkari R, Zina MS. One-Pot Sol-Gel Synthesis of Doped TiO2 Nanostructures for Photocatalytic Dye Decoloration. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s003602362208023x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Photocatalytic Degradation of Rhodamine B and Methylene Orange Using TiO2-ZrO2 as Nanocomposite. Catalysts 2021. [DOI: 10.3390/catal11091035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The present research reports the synthesis of ZrO2-doped TiO2 photocatalysts at different ZrO2 contents (1, 3 and 5% wt.) synthesized by the sol–gel method. The samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction, attenuated total reflectance-Fourier transform infrared, ultraviolet–visible, X-ray photoelectron spectroscopy and N2 adsorption–desorption analysis. The photocatalytic activity of the ZrO2-doped TiO2 was investigated against the dyes methyl orange and rhodamine B through mineralization studies. The ZrO2-doped TiO2 samples presented a semiglobular-ovoid agglomerate shape around 500–800 nm. The samples presented high crystallinity of the TiO2 anatase phase, XPS suggested the formation of Zr–O–Ti bonds and the samples were classified as mesoporous materials with slight changes in the optical features in comparison with pure TiO2. Our study shows that the ZrO2-doped TiO2 composites exhibited a higher photocatalytic activity than just utilizing the synthetized TiO2 and a commercial P25. The different degradation behaviors are attributed to differences in the textural properties, and to the different optical absorptions of the samples due to structural defects created by the level of doping of Zr4+ ions into the TiO2 lattice. Reaction kinetics parameters were calculated by the Langmuir–Hinshelwood model, and a third run cycle of the ZrO2-doped TiO2 at 1% wt. achieved a photocatalytic degradation of 78.1 and 75.5% for RhB and MO, respectively.
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5
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Frisch M, Laun J, Marquardt J, Arinchtein A, Bauerfeind K, Bernsmeier D, Bernicke M, Bredow T, Kraehnert R. Bridging experiment and theory: enhancing the electrical conductivities of soft-templated niobium-doped mesoporous titania films. Phys Chem Chem Phys 2021; 23:3219-3224. [PMID: 33534871 DOI: 10.1039/d0cp06544g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical calculations suggest a strong dependence of electrical conductivity and doping concentration in transition-metal doped titania. Herein, we present a combined theoretical and experimental approach for the prediction of relative phase stability and electrical conductivity in niobium-doped titania as model system. Our method paves the way towards the development of materials with improved electrical properties.
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Affiliation(s)
- Marvin Frisch
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin D-10623, Germany.
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6
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First principles study on copper and iridium co-doped SrTiO3 for shifting the optical absorption into visible region. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03851-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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7
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Kaur M, Shinde SL, Ishii S, Jevasuwan W, Fukata N, Yu MW, Li Y, Ye J, Nagao T. Marimo-Bead-Supported Core-Shell Nanocomposites of Titanium Nitride and Chromium-Doped Titanium Dioxide as a Highly Efficient Water-Floatable Green Photocatalyst. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31327-31339. [PMID: 32470288 DOI: 10.1021/acsami.0c03781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The release of untreated industrial wastewater creates a hazardous impact on the environment. In this regard, the development of an environmentally friendly catalyst is of paramount importance. Here, we report a highly efficient and reusable core-shell TiN/SiO2/Cr-TiO2 (TSCT) photocatalyst that is composed of SiO2-cladded titanium nitride (TiN) nanoparticles (NPs) decorated with Cr-doped TiO2 NPs for the removal of organic contaminants from water. The TiN NPs serve as the main light absorber component with excellent visible-light absorption along with Cr-TiO2 NPs. The TSCT shows remarkable improvement in the photodecomposition of methylene blue (MB) over Cr-TiO2 and TiO2 NPs. An efficient structural design is proposed by adopting calcium alginate beads (P-Marimo beads) as a transparent scaffold for supporting our TSCT, which floats nature on the water surface and realizes easy handling as well as excellent reusability for multipurpose water purification. Surprisingly, our TSCT is found to keep its catalytic activity even after the illumination is turned off. Our proposed P-Marimo-encapsulated TSCT can be utilized as an excellent green photocatalyst with high photocatalytic performance, good recyclability, and easy handling.
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Affiliation(s)
- Manpreet Kaur
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Department of Condensed Matter Physics, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Satish Laxman Shinde
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Satoshi Ishii
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Wipakorn Jevasuwan
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Min-Wen Yu
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Institute of Lighting and Energy Photonics, College of Photonics, National Chiao Tung University, Tainan 71150, Taiwan
| | - Yunxiang Li
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Jinhua Ye
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Tadaaki Nagao
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Department of Condensed Matter Physics, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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8
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Zhang J, Fu D, Wang S, Hao R, Xie Y. Photocatalytic removal of chromium(VI) and sulfite using transition metal (Cu, Fe, Zn) doped TiO2 driven by visible light: Feasibility, mechanism and kinetics. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.07.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Kadi MW, Hameed A, Mohamed R, Ismail IM, Alangari Y, Cheng HM. The effect of Pt nanoparticles distribution on the removal of cyanide by TiO2 coated Al-MCM-41 in blue light exposure. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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10
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Rojas-Trigos JB, Suárez-Quezada V, Lartundo-Rojas L, Suárez-Quezada M. Sol–gel synthesis and characterization of calcium-deficient hydroxyapatite photocatalysts suitable for hydrogen production: influence of the drip rate in the photocatalytic activity. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1465-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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11
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Xu S, Pan D, Wu Y, Fan J, Wu N, Gao L, Li W, Xiao G. Catalytic Conversion of Xylose and Xylan into Furfural Over Cr3+/P-SBA-15 Catalyst Derived from Spent Adsorbent. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01821] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Siquan Xu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Donghui Pan
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Yuanfeng Wu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Jingdeng Fan
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Ningxin Wu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Lijing Gao
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Wenqi Li
- Biosystems and Agricultural Engineering, University of Kentucky, Lexington, Kentucky United States
| | - Guomin Xiao
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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12
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Yaacob N, Ismail AF, Sean GP, Nazri NAM. Structural and photocatalytic properties of co-doped hybrid ZrO2–TiO2 photocatalysts. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0247-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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13
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Mendiola-Alvarez SY, Guzmán-Mar JL, Turnes-Palomino G, Maya-Alejandro F, Caballero-Quintero A, Hernández-Ramírez A, Hinojosa-Reyes L. Synthesis of Cr 3+-doped TiO 2 nanoparticles: characterization and evaluation of their visible photocatalytic performance and stability. ENVIRONMENTAL TECHNOLOGY 2019; 40:144-153. [PMID: 28914168 DOI: 10.1080/09593330.2017.1380715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/09/2017] [Indexed: 06/07/2023]
Abstract
Cr3+-doped TiO2 nanoparticles (Ti-Cr) were synthesized by microwave-assisted sol-gel method. The Ti-Cr catalyst was characterized by X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy, N2 adsorption-desorption analysis, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy (XPS) and zetametry. The anatase mesoporous Ti-Cr material exhibited a specific surface area of 54.5 m2/g. XPS analysis confirmed the proper substitution of Ti4+ cations by Cr3+ cations in the TiO2 matrix. The particle size was of average size of 17 nm for the undoped TiO2 but only 9.5 nm for Ti-Cr. The Cr atoms promoted the formation of hydroxyl radicals and modified the surface adsorptive properties of TiO2 due to the increase in surface acidity of the material. The photocatalytic evaluation demonstrated that the Ti-Cr catalyst completely degraded (4-chloro-2-methylphenoxy) acetic acid under visible light irradiation, while undoped TiO2 and P25 allowed 45.7% and 31.1%, respectively. The rate of degradation remained 52% after three cycles of catalyst reuse. The higher visible light photocatalytic activity of Ti-Cr was attributed to the beneficial effect of Cr3+ ions on the TiO2 surface creating defects within the TiO2 crystal lattice, which can act as charge-trapping sites, reducing the electron-hole recombination process.
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Affiliation(s)
| | - Jorge Luis Guzmán-Mar
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
| | - Gemma Turnes-Palomino
- b Department of Chemistry , University of the Balearic Islands , Palma de Mallorca , Spain
| | | | - Adolfo Caballero-Quintero
- c Laboratorio de Química Forense, Criminalística y Servicios Periciales , Procuraduría General de Justicia del Estado de Nuevo León , Monterrey , México
| | - Aracely Hernández-Ramírez
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
| | - Laura Hinojosa-Reyes
- a Facultad de Ciencias Químicas , Universidad Autónoma de Nuevo León, UANL , San Nicolás de los Garza , México
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14
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Takle SP, Apine OA, Ambekar JD, Landge SL, Bhujbal NN, Kale BB, Sonawane RS. Solar-light-active mesoporous Cr–TiO2 for photodegradation of spent wash: an in-depth study using QTOF LC-MS. RSC Adv 2019; 9:4226-4238. [PMID: 35520159 PMCID: PMC9060456 DOI: 10.1039/c8ra10026h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/12/2019] [Indexed: 11/21/2022] Open
Abstract
A dark coloured effluent called “spent wash” is generated as an unwanted product in sugar based alcohol distillery which is degraded to less toxic compounds using visible light active Cr–TiO2 photocatalyst under natural sunlight.
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Affiliation(s)
- Shrikant P. Takle
- Centre for Materials for Electronic Technology
- Government of India
- Pune 411008
- India
| | - Onkar A. Apine
- Department of Biotechnology
- Shivaji University
- Kolhapur
- India
| | - Jalindar D. Ambekar
- Centre for Materials for Electronic Technology
- Government of India
- Pune 411008
- India
| | | | | | - Bharat B. Kale
- Centre for Materials for Electronic Technology
- Government of India
- Pune 411008
- India
| | - Ravindra S. Sonawane
- Centre for Materials for Electronic Technology
- Government of India
- Pune 411008
- India
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15
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Vásquez GC, Maestre D, Cremades A, Ramírez-Castellanos J, Magnano E, Nappini S, Karazhanov SZ. Understanding the effects of Cr doping in rutile TiO 2 by DFT calculations and X-ray spectroscopy. Sci Rep 2018; 8:8740. [PMID: 29880895 PMCID: PMC5992178 DOI: 10.1038/s41598-018-26728-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 05/17/2018] [Indexed: 12/02/2022] Open
Abstract
The effects of Cr on local environment and electronic structure of rutile TiO2 are studied combining theoretical and experimental approaches. Neutral and negatively charged substitutional Cr impurities CrTi0 and CrTi1− as well as Cr-oxygen vacancy complex 2CrTi + VO are studied by the density functional theory (DFT) within the generalized gradient approximation (GGA) of Perdew-Burke-Ernzerhof (PBE) functional. Experimental results based on X-Ray absorption spectroscopy (XAS) and X-Ray photoelectron spectroscopy (XPS) performed on Cr doped TiO2 at the Synchrotron facility were compared to the theoretical results. It is shown that the electrons of the oxygen vacancy tend to be localized at the t2g states of the Cr ions in order to reach the stable oxidation state of Cr3+. Effects of Cr on crystal field (CF) and structural distortions in the rutile TiO2 cell were analyzed by the DFT calculations and XAS spectra revealing that the CF and tetragonal distortions in TiO2 are very sensitive to the concentration of Cr.
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Affiliation(s)
- G Cristian Vásquez
- Departamento de Física de Materiales, Facultad de CC. Físicas, Universidad Complutense, 28040, Madrid, Spain. .,Department for Solar Energy, Institute for Energy Technology, 2007, Kjeller, Norway.
| | - David Maestre
- Departamento de Física de Materiales, Facultad de CC. Físicas, Universidad Complutense, 28040, Madrid, Spain
| | - Ana Cremades
- Departamento de Física de Materiales, Facultad de CC. Físicas, Universidad Complutense, 28040, Madrid, Spain
| | - Julio Ramírez-Castellanos
- Departamento de Química Inorgánica I, Facultad de CC. Químicas, Universidad Complutense, 28040, Madrid, Spain
| | - Elena Magnano
- IOM-CNR, Laboratorio TASC, S.S. 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Silvia Nappini
- IOM-CNR, Laboratorio TASC, S.S. 14-km 163.5, 34149, Basovizza, Trieste, Italy
| | - Smagul Zh Karazhanov
- Department for Solar Energy, Institute for Energy Technology, 2007, Kjeller, Norway
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16
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Nishiyama N, Kozasa K, Okajima T, Fujitsuka M, Majima T, Yamazaki S. Factors affecting photocatalytic activity of visible light-responsive titanium dioxide doped with chromium ions. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01411f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium dioxide doped with Cr ions (Cr–TiO2) was synthesized by a sol–gel method, with only water as the solvent, and dialysis.
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Affiliation(s)
- Naoto Nishiyama
- Division of Environmental Science and Engineering
- Graduate School of Science and Engineering
- Yamaguchi University
- Yamaguchi 753-8512
- Japan
| | - Keisuke Kozasa
- Division of Earth Science, Biology, and Chemistry
- Graduate School of Sciences and Technology for Innovation
- Yamaguchi University
- Yamaguchi 753-8512
- Japan
| | - Toshihiro Okajima
- Kyushu Synchrotron Light Research Center (SAGA-LS)
- Saga 841-0005
- Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN)
- Osaka University
- Osaka 567-0047
- Japan
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN)
- Osaka University
- Osaka 567-0047
- Japan
| | - Suzuko Yamazaki
- Division of Earth Science, Biology, and Chemistry
- Graduate School of Sciences and Technology for Innovation
- Yamaguchi University
- Yamaguchi 753-8512
- Japan
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17
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Mao G, Xu M, Yao S, Zhou B, Liu Q. Direct growth of Cr-doped TiO2 nanosheet arrays on stainless steel substrates with visible-light photoelectrochemical properties. NEW J CHEM 2018. [DOI: 10.1039/c7nj03830e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis of Cr-doped TiO2 nanosheet arrays grown directly on stainless steel substrates without adding Cr-dopant, which exhibit enhanced photoactivity under visible light.
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Affiliation(s)
- Guobing Mao
- School of Mechanical and Automotive Engineering
- Anhui Polytechnic University
- Wuhu 241000
- P. R. China
| | - Miao Xu
- School of Mechanical and Automotive Engineering
- Anhui Polytechnic University
- Wuhu 241000
- P. R. China
| | - Shuyang Yao
- School of Mechanical and Automotive Engineering
- Anhui Polytechnic University
- Wuhu 241000
- P. R. China
| | - Beibei Zhou
- School of Mechanical and Automotive Engineering
- Anhui Polytechnic University
- Wuhu 241000
- P. R. China
| | - Qi Liu
- School of Mechanical and Automotive Engineering
- Anhui Polytechnic University
- Wuhu 241000
- P. R. China
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18
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Mendiola-Alvarez SY, Guzmán-Mar JL, Turnes-Palomino G, Maya-Alejandro F, Hernández-Ramírez A, Hinojosa-Reyes L. UV and visible activation of Cr(III)-doped TiO 2 catalyst prepared by a microwave-assisted sol-gel method during MCPA degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12673-12682. [PMID: 27832437 DOI: 10.1007/s11356-016-8034-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
Photocatalytic degradation of 4-chloro-2-methylphenoxyacetic acid (MCPA) in aqueous solution using Cr(III)-doped TiO2 under UV and visible light was investigated. The semiconductor material was synthesized by a microwave-assisted sol-gel method with Cr(III) doping contents of 0.02, 0.04, and 0.06 wt%. The catalyst was characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), nitrogen physisorption, UV-Vis diffuse reflectance spectroscopy (DRS), and atomic absorption spectroscopy (AAS). The photocatalytic activity for the photodegradation of MCPA was followed by reversed-phase high-performance liquid chromatography (HPLC) and total organic carbon (TOC) analysis. The intermediates formed during degradation were identified using gas chromatography-mass spectrometry (GC-MS). Chloride ion evolution was measured by ion chromatography. Characterization results showed that Cr(III)-doped TiO2 materials possessed a small crystalline size, high surface area, and mesoporous structure. UV-Vis DRS showed enhanced absorption in the visible region as a function of the Cr(III) concentration. The Cr(III)-doped TiO2 catalyst with 0.04 wt% of Cr(III) was more active than bare TiO2 for the degradation of MCPA under both UV and visible light. The intermediates identified during MCPA degradation were 4-chloro-2-methylphenol (CMP), 2-(4-hydroxy-2-methylphenoxy) acetic acid (HMPA), and 2-hydroxybuta-1,3-diene-1,4-diyl-bis (oxy)dimethanol (HBDM); the formation of these intermediates depended on the radiation source.
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Affiliation(s)
- S Y Mendiola-Alvarez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, UANL, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - J L Guzmán-Mar
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, UANL, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - G Turnes-Palomino
- Department of Chemistry, University of the Balearic Islands, 07122, Palma de Mallorca, Spain
| | - F Maya-Alejandro
- Department of Chemistry, University of the Balearic Islands, 07122, Palma de Mallorca, Spain
| | - A Hernández-Ramírez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, UANL, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, Nuevo León, Mexico
| | - L Hinojosa-Reyes
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, UANL, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, Nuevo León, Mexico.
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19
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Jiang X, Li C, Liu S, Zhang F, You F, Yao C. The synthesis and characterization of ytterbium-doped TiO2 hollow spheres with enhanced visible-light photocatalytic activity. RSC Adv 2017. [DOI: 10.1039/c7ra02165h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
SEM images of Melamine-formaldehyde polymer microspheres (MF) (a) and Yb-doped TiO2 hollow spheres (Yb-TiO2HS) (b).
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Affiliation(s)
- Xueliang Jiang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials
- China
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
| | - Chenjian Li
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
- China
| | - Song Liu
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
- China
| | - Fuqing Zhang
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
- China
| | - Feng You
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials
- China
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
| | - Chu Yao
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials
- China
- College of Materials Science and Engineering
- Wuhan Institute of Technology
- Wuhan 430205
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Ag-loaded mesoporous Pb3Nb2O8 photocatalysts with enhanced activity under visible-light irradiation. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(16)62575-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Umar K, Aris A, Ahmad H, Parveen T, Jaafar J, Majid ZA, Reddy AVB, Talib J. Synthesis of visible light active doped TiO2 for the degradation of organic pollutants—methylene blue and glyphosate. J Anal Sci Technol 2016. [DOI: 10.1186/s40543-016-0109-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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22
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Review on Undoped/Doped TiO2Nanomaterial; Synthesis and Photocatalytic and Antimicrobial Activity. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600735] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Liu W, Sun W, Borthwick AGL, Wang T, Li F, Guan Y. Simultaneous removal of Cr(VI) and 4-chlorophenol through photocatalysis by a novel anatase/titanate nanosheet composite: Synergetic promotion effect and autosynchronous doping. JOURNAL OF HAZARDOUS MATERIALS 2016; 317:385-393. [PMID: 27318735 DOI: 10.1016/j.jhazmat.2016.06.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 06/01/2016] [Accepted: 06/02/2016] [Indexed: 06/06/2023]
Abstract
Clean-up of wastewaters with coexisting heavy metals and organic contaminants is a huge issue worldwide. In this study, a novel anatase/titanate nanosheet composite material (labeled as TNS) synthesized through a one-step hydrothermal reaction was demonstrated to achieve the goal of simultaneous removal of Cr(VI) and 4-cholophenol (4-CP) from water. TEM and XRD analyses indicated the TNS was a nano-composite of anatase and titanate, with anatase acting as the primary photocatalysis center and titanate as the main adsorption site. Enhanced photocatalytic removal of co-existent Cr(VI) and 4-CP was observed in binary systems, with apparent rate constants (k1) for photocatalytic reactions of Cr(VI) and 4-CP about 3.1 and 2.6 times of that for single systems. In addition, over 99% of Cr(VI) and 4-CP was removed within 120min through photocatalysis by TNS at pH 7 in the binary system. Mechanisms for enhanced photocatalytic efficiency in the binary system are identified as: (1) a synergetic effect on the photo-reduction of Cr(VI) and photo-oxidation of 4-CP due to efficient separation of electron-hole pairs, and (2) autosynchronous doping because of reduced Cr(III) adsorption onto TNS. Furthermore, TNS could be efficiently reused after a simple acid-base treatment.
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Affiliation(s)
- Wen Liu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China; Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
| | - Weiling Sun
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Alistair G L Borthwick
- School of Engineering, The University of Edinburgh, The King's Buildings, Edinburgh EH9 3JL, UK
| | - Ting Wang
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Fan Li
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
| | - Yidong Guan
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA.
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25
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Synthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Zhang W, Zuo X, Zhang D, Wu C, Silva SRP. Cr(3+) substituted spinel ferrite nanoparticles with high coercivity. NANOTECHNOLOGY 2016; 27:245707. [PMID: 27159283 DOI: 10.1088/0957-4484/27/24/245707] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The low coercivity of spinel ferrites is a major barrier that significantly limits their use in high density magnetic recording applications. By controlling the substituting content of Cr(3+), in this article we describe how magnetic CoCr x Fe2-x O4 (0 < x < 1.2) nanoparticles with coercivity of up to 6.4 kOe were successfully obtained by the hydrothermal process. The high coercivity is attributed to the synergetic effects of magnetocrystalline anisotropy and the nanoscale size effect. X-ray diffraction analysis confirmed the spinel structure of the nanoparticles with transmission electron microscopy (TEM) suggesting regular tetragonal morphology. The TEM indicated an edge length ranging from 15 nm to 150 nm, which increases monotonically with increasing Cr content. Raman analyses supported the proposed model on the formation mechanism of the nanoparticles, i.e. heterogeneous and homogeneous nucleation.
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Affiliation(s)
- Wei Zhang
- State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, People's Republic of China
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27
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Kuang L, Zhang W. Enhanced hydrogen production by carbon-doped TiO2 decorated with reduced graphene oxide (rGO) under visible light irradiation. RSC Adv 2016. [DOI: 10.1039/c5ra26096e] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon doped TiO2 anchored to reduced graphene oxide formed a hybrid nanocomposite (C-TiO2/rGO) that exhibited greater photocatalytic activity and stability.
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Affiliation(s)
- Liyuan Kuang
- John A. Reif, Jr. Department of Civil and Environmental Engineering
- New Jersey Institute of Technology
- Newark
- USA
| | - Wen Zhang
- John A. Reif, Jr. Department of Civil and Environmental Engineering
- New Jersey Institute of Technology
- Newark
- USA
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28
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Fabrication, characterization and photoelectrochemical performance of chromium-sensitized titania nanotubes as efficient photoanodes for solar water splitting. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-3093-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Dai W, Yan J, Dai K, Li L, Guan N. Ultrafine metal nanoparticles loaded on TiO2 nanorods: Synthesis strategy and photocatalytic activity. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60954-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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de Souza Lourenço RE, Passoni LC, Canela MC. The synergistic effect of TiO2 and H5PW10V2O40 in photocatalysis as a function of the irradiation source. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.05.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Wang L, Sasaki T. Titanium Oxide Nanosheets: Graphene Analogues with Versatile Functionalities. Chem Rev 2014; 114:9455-86. [DOI: 10.1021/cr400627u] [Citation(s) in RCA: 493] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lianzhou Wang
- Nanomaterials
Centre, School of Chemical Engineering and AIBN, The University of Queensland, St. Lucia, Brisbane, QLD, 4072, Australia
| | - Takayoshi Sasaki
- International
Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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32
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Liu W, Ni J, Yin X. Synergy of photocatalysis and adsorption for simultaneous removal of Cr(VI) and Cr(III) with TiO₂ and titanate nanotubes. WATER RESEARCH 2014; 53:12-25. [PMID: 24486715 DOI: 10.1016/j.watres.2013.12.043] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/29/2013] [Accepted: 12/30/2013] [Indexed: 06/03/2023]
Abstract
An one-step efficient simultaneous removal of Cr(VI) and Cr(III) was achieved with mixture of TiO₂ and titanate nanotubes (TNTs). Unlike the conventional two-step Cr removal with a first photocatalytic reduction of Cr(VI) and a subsequent adsorption of Cr(III), the proposed single process significantly reduced reaction time (over 50%). The synergy of photocatalysis and adsorption played an important role in enhancing Cr removal process. The synergetic mechanism was interpreted and indirectly confirmed with H₂O₂ variation during photocatalysis. The instant transfer of the reduced Cr from TiO₂ surface to TNTs interlayer greatly promoted the release of photocatalytic sites of TiO₂, which in turn considerably enhanced photocatalytic activity of TNTs by inhibiting electron-hole pairs recombination. The optimum condition for the whole process was at pH 5. Adsorption of Cr(III) was primarily in the interlayer of TNTs at pH ≤ 5. However, higher pH would lead to precipitation of Cr(OH)₃ onto TNTs as observed by X-ray photoelectron spectroscopy (XPS). Addition of Ca(2+) could promoted photocatalysis owing to its ionic bridging function and form of ≡TiOH(+)-Cr(VI)-Ca(2+)-Cr(VI) linkages, while SO₄(2-) only slightly inhibited photo-reduction of Cr(VI), indicating good synergy of photocatalysis and adsorption even at high ionic strength of electrolyte. Besides, the desorbed TNTs could be easily regenerated by remedying the damaged tubular structure and reused for Cr removal with excellent performance. The outstanding synergetic effects with essential explanation of the mechanism make this study not only fundamentally important but also potentially practical applicable.
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Affiliation(s)
- Wen Liu
- Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Jinren Ni
- Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
| | - Xiaochen Yin
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
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33
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Hajjaji A, Atyaoui A, Trabelsi K, Amlouk M, Bousselmi L, Bessais B, El Khakani MA, Gaidi M. Cr-Doped TiO<sub>2</sub> Thin Films Prepared by Means of a Magnetron Co-Sputtering Process: Photocatalytic Application. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ajac.2014.58056] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Preparation and visible-light photocatalytic properties of BiNbO4 and BiTaO4 by a citrate method. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.03.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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XIE W, CHEN H, ZHANG X, HU X, LI G. Preparation and photocatalytic activity of rutile TiO2 and goethite composite photocatalysts. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60569-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Kernazhitsky L, Shymanovska V, Gavrilko T, Naumov V, Kshnyakin V, Khalyavka T. A comparative study of optical absorption and photocatalytic properties of nanocrystalline single-phase anatase and rutile TiO2 doped with transition metal cations. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.11.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Rabani J, Goldstein S. Mechanisms of Reactions Induced by Photocatalysis of Titanium Dioxide Nanoparticles. ENVIRONMENTAL PHOTOCHEMISTRY PART III 2013. [DOI: 10.1007/698_2013_248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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38
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Luiz DDB, Andersen SLF, Berger C, José HJ, Moreira RDFPM. Photocatalytic reduction of nitrate ions in water over metal-modified TiO2. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.07.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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39
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Seema H, Christian Kemp K, Chandra V, Kim KS. Graphene-SnO2 composites for highly efficient photocatalytic degradation of methylene blue under sunlight. NANOTECHNOLOGY 2012; 23:355705. [PMID: 22894878 DOI: 10.1088/0957-4484/23/35/355705] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Graphene sheets decorated with SnO(2) nanoparticles (RGO-SnO(2)) were prepared via a redox reaction between graphene oxide (GO) and SnCl(2). Graphene oxide (GO) was reduced to graphene (RGO) and Sn(2+) was oxidized to SnO(2) during the redox reaction, leading to a homogeneous distribution of SnO(2) nanoparticles on RGO sheets. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show uniform distribution of the nanoparticles on the RGO surface and high-resolution transmission electron microscopy (HRTEM) shows an average particle size of 3-5 nm. The RGO-SnO(2) composite showed an enhanced photocatalytic degradation activity for the organic dye methylene blue under sunlight compared to bare SnO(2) nanoparticles. This result leads us to believe that the RGO-SnO(2) composite could be used in catalytic photodegradation of other organic dyes.
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Affiliation(s)
- Humaira Seema
- Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang, Korea
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40
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The effect of anatase crystal morphology on the photocatalytic conversion of NO by TiO2-based nanomaterials. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0040-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractHydrogen titanate nanotubes (H-TTNT) were synthesized by the alkali hydrothermal method followed by proton exchange and then submitted either to thermal treatment or to acid hydrothermal reaction to generate TiO2-anatase nanocrystals of different morphologies. The samples were characterized by XRPD, TGA, sulfur analysis, N2 physisorption, UV-Vis spectroscopy and TEM. Their photocatalytic activities were determined by measuring the NO conversion in inert gas stream passed through the powder catalyst bed under UV radiation. Incomplete transformation into anatase resulted in nanomaterials with low activity due to coexistence with H-TTNT or TiO2-B precursors. Anatase specimens derived from H-TTNT aged in strong sulfuric acid media contained equidimensional nanoparticles, but retention of sulfate negatively affected their photocatalytic activity. Combining milder acidic pH with higher aging temperature, allowed synthesis of a sulfate free anatase with the same optical properties and specific surface area as the counterpart produced by calcination of H-TTNT at 550°C; however, the former exhibited truncated bi-pyramid nanocrystals and the other adopted the form of nanorods. This latter showed the highest photocatalytic activity for NO abatement, outperforming the benchmark photocatatyst TiO2-P25; this improved activity was tentatively ascribed to the maximization of high energy {001} facets in anatase nanorods formed during calcination of H-TTNT.
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41
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Yu DH, Yu X, Wang C, Liu XC, Xing Y. Synthesis of natural cellulose-templated TiO2/Ag nanosponge composites and photocatalytic properties. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2781-2787. [PMID: 22548498 DOI: 10.1021/am3004363] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, TiO(2)/Ag sponge-like nanostructure composites have been prepared by the surface sol-gel method with the template of natural cellulose, which is relatively simple, low-cost, and environmentally friendly. The Ag nanoparticles are deposited on the TiO(2) nanosponges through UV irradiation photoreduction of silver nitrate solutions. The physicochemical properties of as-prepared composites are characterized by XRD, BET, SEM, TEM, XPS and UV-vis DRS techniques. The UV-light photocatalytic activities of the composites are evaluated through the photodegradation of two model organic molecules including RhB and salicylic acid. The experimental results show that the photocatalytic activities of TiO(2)/Ag nanosponge composites are superior to that of P25, pure TiO(2) nanoparticle aggregates synthesized by the hydrothermal method and pure TiO(2) nanosponge. The superior activities of TiO(2)/Ag nanosponge composite photocatalysts can be attributed to the unique nanosponge morphology, uniform dispersion of Ag nanoparticles, and strong interaction between Ag and TiO(2) nanosponges.
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Affiliation(s)
- Dong-Hui Yu
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China
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42
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Peng YH, Huang GF, Huang WQ. Visible-light absorption and photocatalytic activity of Cr-doped TiO2 nanocrystal films. ADV POWDER TECHNOL 2012. [DOI: 10.1016/j.apt.2010.11.006] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Tan YN, Wong CL, Mohamed AR. An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants. ACTA ACUST UNITED AC 2011. [DOI: 10.5402/2011/261219] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper aims to review and summarize the recent works on the photocatalytic degradation of various organic pollutants in the presence of nano-doped-TiO2 photocatalysts. In this regard, three main aspects are examined: (a) the presence of various dopants (metal dopants, nonmetal dopants, halogen dopants, metalloid dopants, and codopants) in the formation of nano-doped-TiO2 photocatalysts, (b) the effect of the presence of dopants on the photocatalytic degradation of organic pollutants, and (c) the effects of various operating parameters on the photocatalytic degradation of organic pollutants in the presence of nano-doped-TiO2 photocatalysts. Reports resulted suggest that the formation of a high percentage of the anatase phase, small crystallite size, and high specific surface area of the nano-doped-TiO2 photocatalysts depends on the presence of various dopants in the photocatalysts. The majority of the dopants have the potential to improve the photocatalytic efficiency of nano-doped-TiO2 in the degradation of organic pollutants. The photocatalytic degradation of organic compounds depends on the calcination temperature of the prepared doped TiO2, initial reactant concentration, dosage of doped TiO2, and dopant doping concentration.
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Affiliation(s)
- Yong Nian Tan
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, Seberang Perai Selatan, Pulau Pinang, 14300 Nibong Tebal, Malaysia
| | - Chung Leng Wong
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, Seberang Perai Selatan, Pulau Pinang, 14300 Nibong Tebal, Malaysia
| | - Abdul Rahman Mohamed
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, Seberang Perai Selatan, Pulau Pinang, 14300 Nibong Tebal, Malaysia
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Bizarro M, Sánchez-Arzate A, Garduño-Wilches I, Alonso J, Ortiz A. Synthesis and characterization of ZnO and ZnO:Al by spray pyrolysis with high photocatalytic properties. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.08.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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46
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Enhancement of the photocatalytic activity of TiO2 by doping it with calcium ions. J Colloid Interface Sci 2011; 357:168-78. [DOI: 10.1016/j.jcis.2011.01.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 12/24/2010] [Accepted: 01/05/2011] [Indexed: 11/23/2022]
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47
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Elías VR, Vaschetto EG, Sapag K, Crivello ME, Casuscelli SG, Eimer GA. Synthesis and Photocatalytic Activity of Titania-Loaded Transition Metal-Modified MCM-41 Molecular Sieves. Top Catal 2011. [DOI: 10.1007/s11244-011-9658-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zhang X, Zhou G, Zhang H, Wu C, Song H. Characterization and activity of visible light–driven TiO2 photocatalysts co-doped with nitrogen and lanthanum. TRANSIT METAL CHEM 2011. [DOI: 10.1007/s11243-010-9457-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Ismail AA, Bahnemann DW. Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10407a] [Citation(s) in RCA: 373] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Ismail AA, Bahnemann DW, Rathousky J, Yarovyi V, Wark M. Multilayered ordered mesoporous platinum/titania composite films: does the photocatalytic activity benefit from the film thickness? ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10366k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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